The fact that three fires occurred after car wrecks of the Tesla Model S indicated to Clarence Ditlow of the Center for Auto Safety that there’s a problem.

“There is no question that the National Highway Traffic Safety Administration should start looking at this,” Ditlow told the Times. It doesn’t necessarily mean the cars aren’t safe, the Times said, but raises questions that need to be answered.

At least one of the fires was reviewed and determined to have been caused by the accident itself, rather than any issue with the car, the Times said.

The WSJ pointed out that some of Tesla’s valuation is well-deserved, with owner-entrepreneur Elon Musk doing what he promised to do with the electric car company. But even before the more recent fire, analysts were looking at whether Tesla’s high valuation was justifiable, the WSJ said.

“For a company with a stock price based as much or more on image than financials, those recurring headlines are highly damaging,” an analyst Karl Brauer told the Times.